Last name Řiha (Řiha 
) , in all the world, is a very rare surname. The surname Řiha is habitual in Eastern Europe, particularly Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Řiha | Czechia |
| dvoira řiha Holocaust victim, b. 1911-05-01, DE (b. 1911) |
|